This issue is observed on system with specific BIOS version - R028Q3. Which Sony Corporation has addressed in their latest BIOS version - R0301Q3
http://www.sony-asia.com/support/download/424229/product/vpcs117gg
If you are on a prior BIOS version, you will need to download and upgrade BIOS version to - R0301Q3.
Applies To
Sony VAIO VPCS117GG
Symantec Drive Encryption 10.3.0 MP3